Abstract
Carbon nanotubes are believed to be powerful materials for constructing novel hybrid composites with desirable functionalities and applications in many fields. Therefore, a better understanding of the functionalization of multiwalled carbon nanotubes (MWCNTs) holds the key to a better performance of the hybrid properties. In this paper, with a series of aromatic bifunctional molecule additives, modified MWCNTs were used as composite supports for synthesizing nanostructured palladium catalysts for formic acid oxidation. The additives contain anthranilic acid, o-phenylenediamine, salicylic acid, catechol, and phthalic acid. The influence of the different bifunctional groups (such as –NH2, –OH, –COOH, and their mixed groups) on the morphologies, particle sizes, and electrical properties of Pd nanocrystals was intensively studied. Transmission electron microscopy measurement demonstrates that the palladium nanoparticles were well dispersed on the surface of MWCNTs with a relatively narrow particle size distribution in the presence of the additives. Cyclic voltammetry and chronoamperometry tests demonstrate that the functional groups of the additives play an important role in electrocatalytic activity and stability for formic acid oxidation, and the influence law of various functional groups on electrocatalytic activity and stability is also investigated in this paper. We hope it can provide certain theoretical guidance meaning and practical reference value in future studies.
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References
Antolini E, Salgado JRC, Gonzalez ER (2006) The methanol oxidation reaction on platinum alloys with the first row transition metals, the case of Pt–Co and –Ni alloy electrocatalysts for DMFCs: a short review. Appl Catal B: Environ 63:137–149
Thomas JE, Bonesi AR, Moreno MS, Visintin A, Castro Luna AM, Triaca WE (2010) Carbon nanotubes as catalyst supports for ethanol oxidation. Int J Hydrog Energy 35:11681–11686
Lim B, Jiang MJ, Camargo PHC, Cho EC, Tao J, Lu XM, Zhu YM, Xia YN (2009) Pd-Pt Bimetallic nanodendrites with high activity for oxygen reduction. Science 324:1302–1305
Zhu YM, Ha SY, Masel RI (2004) High power density direct formic acid fuel cells. J Power Sources 130:8–14
Kang SJ, Lee J, Lee JK, Chung SY, Tak Y (2006) Influence of Bi modification of Pt anode catalyst in direct formic acid fuel cells. J Phys Chem B 110:7270–7274
Zhao J, Wang P, Chen WX, Liu R, Li X, Nie QL (2006) Microwave synthesis and characterization of acetate-stabilized Pt nanoparticles supported on carbon for methanol electro-oxidation. J Power Sources 160:563–569
Wang RF, Li H, Feng HQ, Wang H, Lei ZQ (2010) Preparation of carbon-supported core@shell PdCu@PtRu nanoparticles for methanol oxidation. J Power Sources 195:1099–1102
Casado-Rivera E, Volpe DJ, Alden L, Lind C, Downie C, Vazquez-Alvarez T, Angelo ACD, DiSalvo FJ, Abruna HD (2004) Electrocatalytic activity of ordered intermetallic phases for fuel cell applications. J Am Chem Soc 126:4043–4049
Kang YJ, Qi L, Li M, Diaz RE, Su D, Adzic RR, Stach E, Li J, Murray CB (2012) Highly active Pt3Pb and core-shell Pt3Pb-Pt electrocatalysts for formic acid oxidation. ACS Nano 6:2818–2825
Mazumder V, Sun SH (2009) Oleylamine-mediated synthesis of Pd nanoparticles for catalytic formic acid oxidation. J Am Chem Soc 131:4588–4589
Bai ZY, Yang L, Li L, Lv L, Wang K, Zhan J (2009) A facile preparation of hollow palladium nanosphere catalysts for direct formic acid fuel cell. J Phys Chem C 113:10568–10573
Liu ZL, Hong L, Tham MP, Lim TH, Jiang H (2006) Nanostructured Pt/C and Pd/C catalysts for direct formic acid fuel cells. J Power Sources 161:831–835
Wang X, Tang YW, Gao Y, Lu TH (2008) Carbon-supported Pd–Ir catalyst as anodic catalyst in direct formic acid fuel cell. J Power Sources 175:784–788
Uchida M, Aoyama Y, Tanabe M, Yanagihara N, Eda N, Ohta A (1995) Influences of both carbon supports and heat-treatment of supported catalyst on electrochemical oxidation of methanol. J Electrochem Soc 142:2572–2576
Rajesh B, Karthik V, Karthikeyan S, Thampi KR, Bonard JM, Viswanathan B (2002) Pt–WO3 supported on carbon nanotubes as possible anodes for direct methanol fuel cells. Fuel 81:2177–2190
Chen P, Zhang HB, Lin GD, Hong Q, Tsai KR (1997) Growth of carbon nanotubes by catalytic decomposition of CH4 or CO on a Ni-MgO catalyst. Carbon 35:1495–1501
Zhou JM, Lin GD, Zhang HB (2009) Efficient growth of MWCNTs from decomposition of liquefied petroleum gas on a NixMg1-xO catalyst. Catal Commun 10:1944–1947
Wu B, Hu D, Kuang K (2009) Functionalization of carbon nanotubes by an ionic-liquid polymer: dispersion of Pt and PtRu nanoparticles on carbon nanotubes and their electrocatalytic oxidation of methanol. Angew Chem Int Ed 48:4751–4754
Britto PJ, Santhanam KSV, Ajayan PM (1996) Carbon nanotube electrode for oxidation of dopamine. Bioelectrochem Bioenerg 41:121–125
Simmons TJ, Bult J, Hashim DP, Linhardt RJ, Ajayan PM (2009) Noncovalent functionalization as an alternative to oxidative acid treatment of single wall carbon nanotubes with applications for polymer composites. ACS Nano 3:865–870
Wang SY, Wang X, Jiang SP (2008) PtRu nanoparticles supported on 1-aminopyrene-functionalized multiwalled carbon nanotubes and their electrocatalytic activity for methanol oxidation. Langmuir 24:10505–10512
Bai ZY, Guo YM, Yang L, Li L, Hu CG (2011) Highly dispersed Pd nanoparticles supported on 1,10-phenanthroline-functionalized multi-walled carbon nanotubes for electrooxidation of formic acid. J Power Sources 196:6232–6237
Suo Y, Hsing IM (2009) Size-controlled synthesis and impedance-based mechanistic understanding of Pd/C nanoparticles for formic acid oxidation. Electrochim Acta 55:210–217
Zhou WJ, Lee JY (2008) Particle size effects in Pd-catalyzed electrooxidation of formic acid. J Phys Chem C 112:3789–3793
Zhang S, Shao Y, Yin G, Lin Y (2010) Facile synthesis of PtAu alloy nanoparticles with high activity for formic acid oxidation. J Power Sources 195:1103–1106
Liang HP, Lawrence NS, Jones TGJ, Banks CE, Ducati C (2007) Nanoscale tunable proton/hydrogen sensing: evidence for surface-adsorbed hydrogen atom on architectured palladium nanoparticles. J Am Chem Soc 129:6068–6069
Zhou ZY, Kang XW, Song Y, Chen SW (2011) Butylphenyl-functionalized palladium nanoparticles as effective catalysts for the electrooxidation of formic acid. Chem Commun 47:6075–6077
Wang XM, Xia YY (2009) Synthesis, characterization and catalytic activity of an ultrafine Pd/C catalyst for formic acid electrooxidation. Electrochim Acta 54:7525–7530
Weaver MJ, Chang SC, Leung LW, Jiang X, Rubel M, Szklarczyk M, Zurawski D, Wieckowski A (1992) Evaluation of absolute saturation coverages of carbon monoxide on ordered low-index platinum and rhodium electrodes. J Electroanal Chem 327:247–260
Zhao YC, Yang XL, Tian JN, Wang FG, Zhan L (2010) A facile and novel approach toward synthetic polypyrrole oligomers functionalization of multi-walled carbon nanotubes as PtRu catalyst support for methanol electro-oxidation. J Power Sources 195:4634–4640
Chen YX, Heinen M, Jusys Z, Behm RJ (2007) Kinetic isotope effects in complex reaction networks: formic acid electro-oxidation. Chemphyschem 8:380–385
Chen YX, Heinen M, Jusys Z, Behm RJ (2006) Kinetics and mechanism of the electrooxidation of formic acid—spectroelectrochemical studies in a flow cell. Angew Chem Int Ed 45:981–985
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This work was financially supported by the National Natural Science Foundation of China (grant nos. 21171051 and 61176004), Science and Technology Program of Henan Province (grant no. 112102210005), Basic and Frontier Research Program of Henan Province (grant no. 132300410016), and Science and Technology Foundation of He’nan Educational Committee (grant no. 12A150013).
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Huiying Yan and Zhengyu Bai contributed equally to this work and should be considered co-first authors.
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Yan, H., Bai, Z., Chao, S. et al. Effects of additives on palladium nanocrystals supported on multiwalled carbon nanotubes and their electrocatalytic properties toward formic acid oxidation. Ionics 20, 259–268 (2014). https://doi.org/10.1007/s11581-013-0962-6
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DOI: https://doi.org/10.1007/s11581-013-0962-6